Nissan Frontier D22. Manual - part 92

DTC BATT/FLUID TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM 

POWER SOURCE)

AT-337

[RE4R01A]

D

E

F

G

H

I

J

K

L

M

A

B

AT

Diagnostic Procedure

ECS007NT

1. 

CHECK TCM POWER SOURCE

1.

Turn ignition switch to ON position.
(Do not start engine.)

2.

Check voltage between TCM harness connectors M77, M78 ter-
minals (10, 19, 28) and ground.

3.

Turn ignition switch to OFF position.

4.

Check voltage between TCM terminal 28 and ground.

OK or NG

OK

>> GO TO 2.

NG

>> Check the following items:

●

Harness for short or open between fuse block J/B harness and TCM terminals (10, 19 and 28)
(Main harness)

●

Ignition switch and fuse
Refer to

PG-9, "POWER SUPPLY ROUTING"

 .

2. 

CHECK A/T FLUID TEMPERATURE SENSOR WITH TERMINAL CORD ASSEMBLY

1.

Turn ignition switch to OFF position.

2.

Disconnect terminal cord assembly connector in engine compartment.

3.

Check resistance between terminals 6 and 7 when A/T is cold
[20

°C (68°F)].

Is resistance approx. 2.5k

Ω?

Yes

>> GO TO 3.

No

>> 1. Remove oil pan.

2. Check the following items:

–

A/T fluid temperature sensor
Refer to 

AT-339, "A/T FLUID TEMPERATURE SEN-

SOR"

 .

–

Harness of terminal cord assembly for short or open

Voltage

: Battery voltage

Voltage

: Battery voltage

AAT476A

AAT502A

AT-338

[RE4R01A]

DTC BATT/FLUID TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM 

POWER SOURCE)

3. 

CHECK INPUT SIGNAL OF A/T FLUID TEMPERATURE SENSOR

With CONSULT-II

1.

Start engine.

2.

Select “TCM INPUT SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-II.

3.

Read out the value of “FLUID TEMP SE”.

 Without CONSULT-II

1.

Start engine.

2.

Check voltage between TCM terminal 47 and ground while
warming up A/T.

OK or NG

OK

>> GO TO 4.

NG

>> Check the following item:

●

Harness for short or open between TCM and terminal
cord assembly (Main harness)

4. 

CHECK DTC

Perform Diagnostic Trouble Code (DTC) confirmation procedure. Refer to 

AT-335, "DIAGNOSTIC TROUBLE

CODE (DTC) CONFIRMATION PROCEDURE"

 .

OK or NG

OK

>> INSPECTION END.

NG

>>

●

Perform TCM input/output signal inspection.

●

If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

Voltage

Cold [20

°C (68°F)] → 

Hot [80

°C (176°F)]

: Approximately 1.5V 

→ 

0.5V

Voltage

:

Cold [20

°C (68°F)] → 

Hot [80

°C (176°F)]

: Approximately 1.5V 

→ 

0.5V

SAT614J

AAT503A

DTC BATT/FLUID TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM 

POWER SOURCE)

AT-339

[RE4R01A]

D

E

F

G

H

I

J

K

L

M

A

B

AT

Component Inspection

ECS007NU

A/T FLUID TEMPERATURE SENSOR

●

For removal, refer to 

AT-402, "REMOVAL"

 .

●

Check resistance between terminals 6 and 7 while changing
temperature as shown at left.

Temperature 

°C (°F)

Resistance (Approx.)

20 (68)

2.5 k

Ω

80 (176)

0.3 k

Ω

AAT485A

AT-340

[RE4R01A]

DTC VEHICLE SPEED SENSOR·MTR

DTC VEHICLE SPEED SENSOR·MTR

PFP:24814

Description

ECS007NV

The vehicle speed sensor·MTR is built into the speedometer assem-
bly. The sensor functions as an auxiliary device to the revolution sen-
sor when it is malfunctioning. The TCM will then use a signal sent
from the vehicle speed sensor·MTR.

TCM TERMINALS AND REFERENCE VALUE

Remarks: Specification data are reference values.

ON BOARD DIAGNOSIS LOGIC

WAT497

Terminal 

No.

Wire color

Item

Condition

Judgement stan-

dard (Approx.)

40

G/B

Vehicle speed 
sensor

When moving vehicle at 2 to 3 km/h 
(1 to 2 MPH) for 1 m (3 ft) or more.

Voltage varies 
between less 
than 1V and 
more than 4.5V

Diagnostic trouble code

Malfunction is detected when ...

Check item

(Possible cause)

: VHCL SPEED SEN·MTR

TCM does not receive the proper voltage 
signal from the sensor.

●

Harness or connectors
(The sensor circuit is open or shorted.)

●

Vehicle speed sensor

: 2nd judgement flicker